Just inherited a few bottles of single malt, and am looking for a realistic estimated valuation on a green colored bottle of ARBEG, with printing on a green box and bottle that, in the following order, says:

The Ultimate
Single Islay Malt Scotch Whisky
Limited 1978 Edition
Bottled in Scotland in 1998
750 ML and 43% ALC/VOL.

I have spent approximately ten continous hours performing an exhaustive search on the Internet seeking information on the above whisky. The end results of my search indicated no web site with information on this specific whisky. It is like this 20 YO whisky never existed.

Your advice is greatly appreciated.